They force fed 2,000 lab rats the equivalent of 9,000, 16 oz. bottles of sassafras based root beer a day over the course of an entire year. 3 of them got cancer. The rest of them gained 20 lbs. Thus the sassafras removal. This gave some other genius the idea to run the same tests on saccharin, producing the same result. So long saccharin as well. Then they tested DDT.....